Apparatus for treating and blending molders&#39; sand



G. F. ROYER Nov. 19', 1 929.

APPARATUS FOR TREATING AND BLENDING MOLDERS. SAND 5 Sheets-Sheet 2 l Filed July l2 Geo/ye F Doge/z,v

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Nov. 1'9, 1929. G. F. ROYER APPARATUS FOR TREATING AND BLENDING MOLDERS SAND Filed July' 12. 1927 3 sheets-sheet George F. @ye/z.

` GEORGE r. ROYER, or WILKEs-BAaRE,

Patented Nov. 19, 1929 I UNITED STAT rnNNsYLvANIa] Lessie-Nor; 'ro'` vROYER FOUNDRY ANDMACHINE co., or waxes-BARRE, sur'NNsYinaium, e'oonroan- H TION 0F PENNSYLVANIA v APPARATUS F012l TREATING 'AND BLENDING Monnaies SAND' V' Application filed July 12,

The present invention relates to improvements Vin apparatus of the character 4of that described and claimedin an earlier Patent No. 1,559,915, dated November 3, 1925.

The object of the present invention is to provide a machine of the characterl referred to which will specifically have certain advantages over theinachinev of said patent and which will be hereinafter -rnore particularly described.

, In the accompanying drawings Figure 1 is a side elevation, partly broken away, of'an embodiment of the present invention. l

vFigure 2J is a transverse vertical section through the hopper, substantially on the line 2-2fof- Figure 1. Q

l Figure 3 is a detail.

Figure 4 is a section substantially on the line of Figure 3.

Figure 5 isa horizontal section through the -inot'or easing. t j

Figure is a section' substantially on the line 646y of'Fi'gure 5, and r i `Figure 7 ls a'transverse vertical section throughthe hopper adjacent the lower end thereof. Y i

In the several parts are designated by the 'same reference characters and it will be understood that some of the parts are shown more or less diagrammatically andthat there can be variation in the details illustrated without departing from the invention. Y l

Except where specifically referred to in the appended claims, the invention is not to beunderstood as being limited to the exact details shown.

' Referring particularly to Figure 1, it will be seen thatthe improved machine, like that of the patent referred to, includes a suitable hopper, having side wallsV 1, which vis open at the bottom' and positioned above a flexible separating belt 2 mounted upon suitable supporting rollers to travel 'in a vertically 1nclined direction, the upper supporting roll 3V being connected by suitable gearing enclosed in'a casing 4 with asprocket 5 on the yshaft 'of-' an electric motor 6. Th'e'belt supporting rollers and the motgr l supporting pulley 3;

figui'resL ofthe drawing, like are mounted ina supportingframe which is in the form ofarea'dilyportable'truck'having ground wheels 7 and a trail extension 8. By means of suitable handle's'9, inserted in sockets 10, one ateach side ofthe machine, the entire apparatus` may be readily moved overa foundry floor or other surface on rated particles collected inthe spaces between the sprigs on the belt will be vdischarged in a stream as Athey pass over the upper belt llhe speed 'at vwhich* the belt driven is such that the stream of particles thus separated and collected will bedischarged at a considerable distance from the apparatusl,the

passage of the samethrough the air serving to thoroughly areate them and assist in' con-l ditioning the material for'zuse in the preparation of metal molds. n

The'separating belt of the present improvements is preferably made of suitable woven fabric and is provided adjacent its edges with referred to are preferablyjform'ed by serrating the outwardly projecting `flanges vof angle-shaped members, the bases-of which` are suitably secured to the body of the belt. As shown, each of the sprig plates extends substantially across the space between the mar.-

ginal flanges or ribs 12 on the 4belt andsaid.

The plates may, of course, be of various lengths and a plurality of aligned plates may be employed for providing veach *transverse row of sprigs.

As shown, particularly in vFigure 2,' the" supporting `frame includes two main members 15'of angle iron and theside walls 1- of kthe hopper are suitably Connected' to saidv so Y outwardly projecting'ribs 12. .The sprigs 13 angle iron bars, the upper portions of such walls being flared outwardly, as shown. The lower portions of the side walls of the hopper are deflected `or inclined inwardly as at 16, terminating some distance within the channel V formed by the marginal flanges :or ribs l2 on the separa-tingv belt.A These inwardly `inclinedportions of theside walls ofthe hopper are. strengthened by angles 17 and thema- "terial delivered into the hopper is, therefore,

depositedtoward the center of the belt rather than adjacent the side edges thereof, thus rey duc-ing the wear on the fabric and the particlescollectedbetweenthe sprigs areeffeetively f prevented from passing over the edges of they belt bythe/,marginal ribs or flanges l2,- which, asshownyextend outwardly to the plane ofl the in-ter edgesv of the separating sprigs.

@ne ofthefeatures of improvement of the i present-invention Overthe lconstruction of the prior patent referredv to,*is the manner in which *the ydetente or sweeps forming a portion of the-upper endy wall" of the hopper, are

constructed and mounted; -These detents'or sweeps consist of suitable metal blades which are'supported in `,apositionv substantially perj pendicu'lar v.tothe path of 'travel of the belt, andhave their lower ends in close proximity .torthej outer edges Y of the separating sprigs. .They Lact tonormally :prevent passage of nn.

,desirableinaterialg such `as nails,scrap metal, nuts and ,so forth, which are frequently mixed vwith used molders sand, or other. undesirably large pieces that are notcolleoted in the spaces separating the arsprigs, over the-upper .beltvlsupporting roll and being discharged with thel liner particles that have been coll i 'lectedL by the belt.

wlnthe @embodiment-,of the invention illus- `tratedeaCh of these detentor sweep members V isprovidged ongits outer face with'an ape'rl tured ear orlug 2l, saidearsbeingmounted on artransverse-rod 22 which issupported at its ends in `the side walls 2 3 of a lframe which is adjustably connectedwith the 'side hopper walls l. As showm'the-Side members 23 of `Mthisframeare connected topone member of an angleiron 24; the other member ofv which is rivetedor otherwise permanently-secured at Y25 toportions 26 .of the upper end -wall of thehopper that project laterallybeyondthe -edgesof the belt 2. Y :The bolts which 'connect the detent or sweepsupporting frame with the angle frame membersj24 extend `through suitable slots 2e so-thatfthc detente .or sweep members may be bodily adjusted relative'to the beltto mainytain the desired Vminimum clearance or space betweentheir lower ends and the `scparzuring sprigsonthe belt. A transverse rod 320011- nects the side members 23 of the detent supportingframe ancl-fwfithithis rod are engaged the outer endsof a. series of Coil springs 35,

the other end of each "of said springsV being attached as zit-36 to onegof the detentor sweep plates 20 at points above the axial support thereof; The springs 35 act to maintain the upper ends of the'detents or sweeps 20 in contact with an abutment 37A shown as the top of ther frame ofwhichthe'members 23 are thesides.y Y i Y i It will be seen that with this arrangement anyone of the detente or sweeps isadaptedto be rockedabout the axislof the .supporting rod 22 in case an nndesirably. largeipiece of material becomes suiiciently fattachedto the belt to prevent itsbcing readily dislodged as it comes in Contact with the lower forward face ofthe sprigyor detent. After the detent j has been `rocked,rearward to permit the passage of suoli an obstruction, it'will be 'restored to normal position,v asfjshown in Figure 1,by the actionof the spring 35;` -i

'Ihef-formfand manner `ofmountingr-the de,- tents or sweeps 20, hereinbeforedescribed, avoids an objection that has been fnoted iifnthe construction of my prior patent `referred to lith thearra-ngementof filexible, Vor=yield ingmateriah blades :described -in the patenty it has beenfound, in some instances,lthat after extensive use `of machineusaid-,blades will become permanentlyfl-@leoted from their normalposition and, therefor,ej', be less `efficient than when first installed. 4 It will be a-pprecif ated that the inassfof materialyinthe-hopper constantly exerting, ia .pressure ,tending .to move the lower ends of the bladestoward, or over, the upper belt suppontingfrollyand that .occasionally eachvblade wil-l be moved from` its` operative position toallowl of the Apassage of a` particle larger than can yhe' completely received in the'pockets betweenfthesprigs. After a considerable period of Ause `this-repeated flexing of thelbladesiresults in" their acquiring a `permanent Abend or ffset and that they will notreturn to the vdesired :normal-poln thefiinpi-ovedmachine, the outlet at the lowerfend ofthe hopper' ifsnormally closed by a gate Unsupported Olin 100k: Shaft 4l iountedin bearings :in the fwalls l'of the'hopf per andprovided,atV oneend-with a handle e2'that` eXtends-'abovethe upper edgefof the hopper sidel wall-so that it" may be readily grasped byan attendant. .Bya-rockingf the shaft 4l the gate'lO may be turned'softhat pieces which have been separated from the desired granular particles may be discharged from the lower end of the belt instead of having to be manually removed therefrom as in the machine of the earlier patent where the lower end 2 of the hopper was of a stationary nature.

According to the present invention,the motor 6 is mounted within a suitable metal casing and preferably upon a base plate Vof a flexible nature. rlhis motor supporting base is rigidly secured at one edge as by bolts 5l to the truck frame or body and adjacent its other edge is engaged with a threaded sleeve 52 which engages a threaded aperture in the truclr body or supporting frame. The sleeve 52 is shown asfmounted loosely upon a stud 53 riveted at one end to the flexible motor supporting plate 50 and provided at its other end with a nut 54 so that said sleeve may be readily rotated to raise or lower the edge of the motor supportingplate connected with the stud 58. By rotating the sleeve 52, the motor 6 may be bodily adjusted vertically, slightly, sufficient to maintain the sprocket chain constituting a portion of the gearing between the motor and upper belt supporting roller 3, properly taut. The motor is shown having corner lugs or ears which are bolted to the plate 50. l

To prevent sagging of the upper run of the separator belt between the supporting rolls, a plate Z0 is provided. This plate is suitably supported from the angle iron frame bars 15. As shown, bars or straps 71 are secured to Aand extend transversely across the lower face belt, are engaged by threaded rods 72 which extend through the angle frame bars l5 and thus suspend the plate from said frame. Theother bars -71 of the plate are engaged with adjusting screws 7 3, the upper ends of which bear against the lower faces of the frame angle bars 15. By adjusting the screws 73 and threaded supporting rods 72, the plate is maintained in proper position to support the upper run of the separator belt and prevent sagging thereof. The manner in which the improved machine operates may be. briefly described as follows:

The material to be treated, preferably used molders sand or a mixture thereof and fresh sand, is deposited on the separator belt within the walls of the hopper, the belt being rotated at a relatively high speed. The separating sprigs on the belt act to detach small granulai' particles and collect the same while undesirably large pieces of foreign bodies such as nails, nuts and pieces of metal, which are commonly mixed with the used sand, areprevented from passing from the hopper by the sweeps or detents 20. The small particles collected in the spaces between the sprigs on the be`t are discharged in a stream from the upfor other purposesjand for treatingdi-fferent materials. For example such apparatus has been found to be very eiiicient in preparing top soil or dressings for lawns, golf greens l. InV an apparatusfor the'purpose de-VV .l

scribed the `combination offa supporting frame,a flexible belt mounted onl the frame to travel in anupwardly inclined direction' and provided on its outer face with means for separating granular particles from a ymass of material deposited'on the .beltand collecting the separated particles, and av 'hopper open at the bottompositioned above vthe belt and having in its upper end wall a plurality of bladelike .members extending substantially perpendicular to the path of'travel of the vbelt and having their lowerends closelyv adjacent the separating elements onthe belt, and adapted to move *inthedirection of travel of vthe belt under excessive pressure,

lthe side walls of the' hopper adjacentl the lower edges Ythereof being deflected inward over the belt and'the'latter having marginal projections preventing particles` collected thereby from passing over the edges of the belt. f

`2. In an apparatus for the purpose described, the combination of a supporting frame, a flexible belt mounted in said frame to travel in an upwardly inclined direct-ion and provided on its outer face with means for separating granular particles from a body of material deposited on the belt and collecting the separated particles, lahoppery for laterally conlining the material upon the belt and having in its upper end wall a plurality of blades, the lower ends of which are normally positioned closely adjacent the y separating means on the belt and adapted to yield in the direction of travel of the-belt, for the purpose described, said blades being bodily adjustable in the direction of their length to vary the distance normally separating their 'lower ends from the belt.

3. In an apparatus for'the purpose described, the combination of a supporting' frame, a flexible belt mounted in said frame of material deposited on the belt and collecting the separated particles, a hopper for laterally confining the material upon the belt hand.

1 afa and having in its upper end wall a plurality of blades, independently supported to rock vabout an aXis extending transversely of the belt vand having their lower ends normally positioned Vclosely adjacent the separating means on the belt, said blades being bodily adjustable in the direction of their-length to vary the distance normally separating the lower ends thereof from the belt, and means for yieldinglyretaining the blades in a predetermined angular relation to the belt.

' 4. In an apparatus for thev purpose described, the combination of a; supporting,` frame, a lexiblebelt mounted in said frame to 'travel in an upwardly inclined direction and provided on its outer face with means for` separatingl granular particles from a body of material supported on the belt and collecting the separated particles, a; hopper for laterally confining the material upon the belt, arod extending across the upper end of the hopper, bearings for said rod secured to lthe side walls of the hopper and adapted to be bodily adjusted vertically, a series oi:

ff blades mounted to rock on said rod and cole lectively forming a part of the upper end wall of the hopper, the lower ends of said Yblades beingrv normally closelyy adjacent the separating means on the belt, and yielding c L means normally maintainingsaid bladesV in ya predetermined angular relation tothe belt.

In testimony whereof I have hereunto V,set

GEORGE F. ROYER. 

